/*
 * MIT License
 *
 * Copyright (c) 2020 wen.gu <454727014@qq.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/***************************************************************************
 * Name: app_manqager.h
 *
 * Purpose: application manager implementation
 *
 * Developer:
 *   wen.gu , 2020-19-15
 *
 * TODO:
 *
 ***************************************************************************/

/******************************************************************************
 **    INCLUDES
 ******************************************************************************/
#ifndef __PANDA_APP_MANAGER_H__
#define __PANDA_APP_MANAGER_H__

#include <list>
#include <string>

#include "panda/core/types.h"
#include "panda/core/errors.h"
#include "panda/com/service_provider.h"
#include "panda/core/json.h"
#include "panda/app/app_engine.h"

namespace panda
{

/******************************************************************************
 **    MACROS
 ******************************************************************************/

/******************************************************************************
 **    TYPE DEFINITIONS
 ******************************************************************************/
using panda::app::AppFocusState;
using panda::app::AppRequestFocusType;

struct stackNode
{   
    uint8_t priority;
    AppFocusState state;
    std::string appName;
        
};

using AppStateStack = std::list<stackNode>;
/******************************************************************************
 **    CLASSES/FUNCTIONS DEFINITIONS
 ******************************************************************************/
class AppManager final
{
public:
    using PandaErrc = panda::core::PandaErrc;
    using Value = panda::core::Value;
    using ServiceProvider = panda::com::ServiceProvider;
public:
    AppManager();
    ~AppManager();

    PandaErrc initialize();

public:
    PandaErrc onRequestFocus(const Value& param);
    void onReleaseFocus(const Value& param);


protected:
    void findAndRemoveFromStack(const std::string& appName); /** find current app is already exist in stack */
    void tellOtherAppFocusLost(AppFocusState lostState);

    void tellAppGainFocus(const std::string& appName);
    void tellAppLostFocus(const std::string& appName);
private:
    ServiceProvider* mProvider = nullptr;

    AppStateStack mStateStack;

};

} /** namespace panda*/

#endif /** !__PANDA_APP_MANAGER_H__ */